Electrical measuring instrument.



PATENTED -SEP'1'.24, 1907.

I. W. VARLEY. ELECTRICAL MEASURING INSTRUMENT.

' APPLIOATION FILED ennui. 190s.

r I Inventor:

by I

M B. Atty The principle of the invention as shown and described is applicable to either alternating or direct currents and may be utilized in the construction of volt meters and ammeters as well as in either integrating or indicating watt meters, as is clear to any one skilled in the art.

It is further obvious that other details illustrated may be considerably varied and parts and functions trans posed without departing from the spirit of my invention, and I do not restrict myseli to any of the details as shown and described. I

What I claim and desire to secure by Letters Patent of the United States is ztially constant magnet for creating a field of force, a sta -tionary coil for distorting or displacing said constant field,

and a movable coil in a balanced condition with relation to the constant niagnetic field when no current is passing through the stationary coil but becoming unbalanced so as to rotate when current is passing through the stationary coil, and so arranged as to form a two-pole armature.

2. In an apparatus of the character described a substantially constant magnet for creating a field of force, a stationary coil for distorting or displacing stfid magnetic field in a diagonal direction with relation to the poles of said constant magnet, and a movable coil in a balanced condition with relation to the constant magnetic field when no current is passing through the stationary coil and becom ing unbalanced so as to rotate when current is passing through the stationary coil.

3. In an apparatus of the character described a substantiaiiy constant magnetior creating a field of force, a sta tionary coiltor distortingor displacing said constant field in a diagonal direction with relation to the poles of said constant magnet and a movable coil in a balanced c0ndi tion with relation to the constant magnetic held when no current is passing through the stationary coiland becoming unbalanced so as to rotate when current ispassing through the stationary coil, and so arranged as to form a two-pole armature.

4. In an apparatus of the character described a substantially constant magnet for creating a field of force, pole pieces on said magnet having a plurality of polar projections on each pole piece, a stationary coiljor distorting or .L. In annpparatns of the character described a snlJstanthe presence 0t twosnbscrihing witnesses.

displacing said constant field and a movable coil ln-n halanced condition with relation to the constant magnetic field when no current is passing through the stationary coil and becoming unbalanced so as to rotate when the current is passing through the stationary coil, and so arranged as to form a two-pole armature.

' a movable coil in a balanced condition with relation to the constant magnetic field when no current is passing through the stationary coil and becoming unbalanced so as to rotate when current is passing through the stationary coil.

6. In an apparatus of the character described a substnn tially constant magnet for creating a ticld.o[ force, pole pieces on said magnet having a plurality of polar projections'on each pole piece, a stationary coil for distorting or displacing said constant field in a diagonal direction with relation to the poles of said constant magnet and a movable coil in a balanced condition with relation to the constant magnetic field when no current is passing through the stationary coil and becoming unbalanced so as to re tate when the current is passing through the stationary coil and so arranged as to form a two-pole armature.

Z In an apparatus of the character described a suhstan-' tinily constant magnet for creating a tield of force, pole pieces on said magnet having a plurality of polar projections on each pole piece, a stationary coll for distorting or displacing said constant field in a diagonal direction with relation to the poles of said constant magnet and a nlov able'coil in a balanced condition with relation to the constant magnetic held when no current is passing through the stationary coil and becoming unbalanced so as to refate when the current is'passing through the stationary coil and so arranged as to form a two-pnlc closed circuit armature.

In witness whereof I have hereunto signed my name in THOMAS W. VARLEY Witnesses Snanunr C. MAS'JICK, '1. FRANK \Voonsmn. 

